The TacFire BU-556-10 Pistol Upper Assembly delivers a compact, high-performance AR platform upgrade built around a 5.56x45mm NATO caliber with a 10" black nitride barrel, featuring a black anodized 7075-T6 aluminum receiver and a robust M-LOK handguard designed for flexible accessory mounting. This complete upper includes a Bolt Carrier Group and is optic-ready with no fixed sights, allowing you to pair your preferred aiming solution for fast, accurate engagement. The combination of the 10" barrel, precision finish on the barrel and receiver, and the resilient M-LOK handguard provides a balanced profile suitable for dynamic field use, range sessions, or tactical scenarios where compact handling is essential. Engineered to deliver reliable cycling and consistent performance with 5.56x45mm NATO ammunition, this upper is ideal for users seeking a ready-to-install pistol upper that maximizes maneuverability without sacrificing durability. Whether youre building a compact AR pistol for personal defense, a compact sporting setup, or a versatile plinking platform, TacFires BU-556-10 upper offers rugged construction, easy integration, and the flexibility to tailor optics and accessories to your specific needs.